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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Vehicle Access System) >> Diagnostic Information and Procedures >> Door Will Not Open/Close, Door Binding, or Locks, Handles, or Cylinders Do Not Function

Door Will Not Open/Close, Door Binding, or Locks, Handles, or Cylinders Do Not Function

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
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DEFINITION: This diagnostic table is designed to address the mechanical diagnosis of the door latching system, which could include the inside and outside handles, latch rods/cables, latches, or latch cylinders.
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Were you sent here from a Vehicle Access Symptom Table? Go to Step 3  Go to Symptoms - Vehicle
3 Does the door open with both handles? Go to Step 4  Go to Step 12 
4 Does the door open with the outside handle? Go to Step 5  Go to Step 13 
5 Does the door open with the inside handle? Go to Step 6  Go to Step 14 
6 Does the door close and latch properly? Go to Step 7  Go to Step 15 
7 Does the manual lock knob lock and unlock the latch smoothly without binding? Go to Step 8  Go to Step 16 
8 Does the door lock switch and/or the keyless entry transmitter lock and unlock the door latch or door latches? Go to Step 9  Go to Step 18 
9 Is the outside key cylinder loose or does it rattle or fall out? (if equipped) Go to Step 19  Go to Step 10 
10 Does the outside key cylinder lock and unlock the latch and function smoothly without binding? (if equipped) Go to Step 11  Go to Step 20 
11 Does the door bind, does it take excessive effort to open, or is it misaligned? Go to Step 21  Go to Step 22 
12 Door will not open with both handles:
  • Unlock the door and disengage the rear child security lock, if equipped.
  • Aggressively snap outside door handle multiple times (release the handle from the full travel position as quickly as possible).
  • Rapidly unlock the door from the key fob or the inside unlock switch multiple times. After the last unlock cycle, pull both handles.
  • With the door still unlocked, press inboard on both the inside and outside handles. Ensure not to damage the outer panel or trim panel. Then, cycle each handle to full travel to release.
  • If the door still does not open, pull outside handle to full stop. Cut the outside handle gasket from underneath outside door handle. With the gasket removed, press inboard on the outside door handle (ensure not to damage the outer panel). Then, cycle the outside door handle to full travel and release handle.
  • If the door still does not open, remove the door trim panel enough to gain access to the inside door handle cable. Completely remove inside door handle cable from inside door handle. This step will cause damage to the door trim panel.
  • If the door still does not open, remove the door trim panel enough to gain access to the side door latch. Reach inside the door and remove the outside cable from the door latch. Reach inside the door and lift up on the outside release lever of the side door latch.

Did you find and correct the condition?		 Go to Step 21  Go to Step 18 
13 If the door will not open with the outside handle, or the handle is obstructed or loose, check the following:
  • For cold weather freezing, thaw as necessary.
  • Check the handle for foreign material. Remove material as necessary.
  • Check the handle grab bar for looseness or damage. Repair as necessary.
  • Check the handle for full travel.

If the issue is not resolved, remove the trim panel as necessary to gain access to door hardware and check the following:
  • Check the handle chassis for loose fasteners, broken chassis inserts, or loose or missing spring.
  • Remove the door trim panel as necessary to check that outside door handle cable is properly attached at both door latch and outside handle. If the cable is pinched, kinked, or improperly installed, correct as necessary.

Did you find and correct the condition?		 Go to Step 22  Go to Step 15 
14 If the door will not open with the inside handle:
  • Check the inside handle for foreign material. Remove material as necessary.
  • Check that the handle is secure. Correct as necessary.
  • If rear door, verify child security is not engaged.
  • Remove the trim panel as necessary to and check the inside handle rod/cable attachments at both the latch and handle. If the cable is kinked or pinched, correct as necessary.
  • Remove the door trim panel as necessary to check that inside door handle cable is properly attached at both door latch and inside door handle. If the cable is pinched, kinked, or improperly installed, correct as necessary.

Did you find and correct the condition?		 Go to Step 22  Go to Step 16 
15 If the door does not close or latch properly or partially:
  1. Check that the lock/unlock lever on the latch is in the open position to allow the door to close.
    • Apply pressure to the lock/unlock lever in the open position with a plastic trim tool while simultaneously pulling the outside door handle.
  2. If the door does not properly close, remove the door trim panel as necessary and check the following components:
    • Check that the outside and inside door handles are properly attached at the door latch and both handles. If the cables are pinched, kinked, or improperly installed, correct as necessary. Both handle levers should always return to home position after handle actuation.
    • Verify the door striker is properly aligned. If not, adjust the door striker.

Did you find and correct the condition?		 Go to Step 22  Go to appropriate Door Latch Replacement procedure.
16 If the door will not unlatch or is difficult to unlatch with the inside manual lock knob:
  • For cold weather freezing, thaw as necessary
  • Check the lock knob for a loose condition. Repair or replace as necessary.

Check the lock knob for binding or dragging using the following procedure:
  1. Remove the lock knob.
  2. If condition goes away, check for drag/interference of the lock knob against the inner belt seal, or the trim panel. Correct as required.

If further action is required, remove the trim panel and check the lock rod and lock knob for interference with the following:
  • Water deflector/paper
  • Side impact foam
  • Rod grommet in sheet metal
  • Glass run channel
  • Other rods or cables
  • Trim panel

Did you find and correct the condition?		 Go to Step 22  Go to Step 17 
17 With a manual lock, if the latch will not function properly do the following:
  1. Function the lock/unlock lever on the latch to unlock the latch. Check for high internal resistance.
  2. With the door open, manually close the latch with a screwdriver.
  3. Check the latch for internal binding by actuating the latch with the inside door handle lever.
  4. Manually close the latch with a screwdriver again.
  5. Check the latch for internal binding by actuating the latch with the outside door handle lever.

Did you find and correct the condition?		 Go to Step 22  Go to Step 18 
18 If power locks are included in vehicle options and do not function with either the keyless entry transmitter or switch:
  1. For cold weather freezing, thaw as necessary.
  2. Remove trim pad as required and check the following:
    • Verify door harness has appropriate power connectors for switches and latch.
    • Check harness connector pins for corrosion.
    • Assure wire harness connectors are seated and locked properly at latch and switch. Remove and re-seat if required.
    • Check door harness for cuts/chafing/corrosion. Correct/replace as required.
    • Check for 12V at latch and door switch. Correct/proceed accordingly.
    • Check BCM for trouble codes. Correct/proceed accordingly.
  3. If power locks still do not function do the following:
    1. Remove latch from door cavity.
    2. Connect latch to electrical connector outside the door.
    3. Function power lock/unlock switch. Watch for lock/unlock lever on latch to move completely from one position to the other.
    4. If lever does not move, remove connector from old latch and attach to new latch outside of door cavity.
    5. Verify new latch is functional, if so, attach rods and install new latch in door.

Did you find and correct the condition?		 Go to Step 22  Go to Step 19 
19 If the key cylinder is loose do the following:
  • Remove the trim if necessary.
  • Check that the retaining clip is installed properly. (if equipped)
  • Check that the fastener is properly torqued. (if equipped)

Did you find and correct the condition?		 Go to Step 22  Go to Step 20 
20 The outside key cylinder will not lock and unlock the latch and function smoothly without binding:
  1. For cold weather freezing, thaw as necessary
  2. Remove trim if required.
  3. Check that the key cylinder rod is securely attached both to the key cylinder pawl and the latch.
  4. Check that key cylinder lever, rod and latch lever are free of interferences. Remove interferences as required.
  5. Check that latch cylinder rod is routed properly. Re-route as required.
  6. Remove rod from latch cylinder and actuate cylinder. Check for internal resistance. Lubricate latch cylinder as required
  7. Verify Cylinder rotates with vehicle key. If not, code and replace cylinder to match vehicle key. See latch cylinder coding and replacing.

Did you find and correct the condition?		 Go to Step 22  Go to Step 21 
21 The door is difficult to open:
  • Check for interference with the fender, adjacent door, body opening or door striker and adjust as necessary.
  • Check for binding door hinges. Lubricate or align/adjust as necessary.
  • Check the door check link for binding. Lubricate as necessary.
  • Adjust the door as necessary.

Did you find and correct the condition?		 Go to Step 22  Go to appropriate Door Lock Striker Adjustment procedure.
22 Verify proper operation of the door closing system.
  • Outside handle
  • Inside handle
  • Manual lock/unlock
    • Outside key cylinder
    • Inside latch knob
    • Double pull handle
  • Power lock/unlock
    • Key fob
    • Door switches
  • Door opening/closing effort

Is the condition still present?		 Go to Step 1  System OK
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